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WorksheetsQA2 Review Science
Total questions: 45
Worksheet time: 2hrs 51mins
What is a controlled variable in an investigation?
The part of the experiment that is changed on purpose
The part that is measured or observed
The part that stays the same to keep the test fair
A student is testing how different amounts of light affect plant growth. The plants all get the same amount of water and soil. What is the controlled variable in this experiment?
Amount of light
Amount of water and soil
Height of the plants
A student rolls a marble down a ramp to test how ramp height affects speed. They always use the same marble. What is the controlled variable?
The marble used
The speed of the marble
Ramp height
What is an independent variable in an investigation?
The factor that is changed on purpose
The factor that is measured
The factor that stays the same
A student is testing how the amount of water affects how tall plants grow.
What is the independent variable?
Height of the plants
Type of soil
Amount of water
A student rolls a marble down a ramp at different ramp heights to see how speed changes.
What is the independent variable?
Ramp height
Time it takes to roll
Type of marble
What is a dependent variable in an investigation?
The factor that stays the same
The factor that is measured or observed
The factor that is changed on purpose
A student tests how amount of water affects plant growth.
What is the dependent variable?
Height of the plants
Amount of water
Type of soil
Students are testing this hypothesis:
“The more air inside the balloon, the farther the balloon rocket will travel.”
To test the hypothesis correctly, which part of the experiment should the students measure?
The distance the balloon rocket travels
The type of string used in the setup
How many times the balloon is tied
In a balloon rocket experiment, students change the amount of air in the balloon each trial.
Which part of the experiment should stay the same to keep the test fair?
The amount of air inside the balloon
The balloon and straw used for each trial
The distance the string is stretched across the room
A student measures friction using books of different masses. They always pull the book across the same floor surface. What is the controlled variable?
Mass of the book
Force recorded
Type of floor surface
A student pulls a book across a smooth floor and measures the force needed.
If the student repeats the experiment on a rough surface, what will most likely happen?
The book will need more force to move across the rough surface
The book will need less force to move across the rough surface
The force needed will stay exactly the same
What is one way to reduce friction when pulling objects up a ramp?
Add sandpaper to the ramp
Increase the weight
Make the surface smoother
A circuit will only work if—
The wires are not connected
It is a closed circuit
It is an open circuit
Which one is an open circuit?
What happens in an open circuit?
The light turns on
Energy flows freely
The energy flow is broken
What is wrong with this circuit?
The lightbulb does not work
The wires are not connected to both ends of the battery
The battery no longer works
Which kind of circuit has more than one path for electricity to flow?
Series
Parallel
Series and Parallel
Study the picture. Will any of the lightbulbs light up in this circuit if the switch remains open?
No, the circuit isn't closed with the switch open.
Yes, Bulbs 2 and 3 will light up.
Yes, only Bulb 3 will light up.
Yes, Bulbs 1 and 3 will light up.
When light hits a mirror, it—
Refracts
Reflects
Absorbs
The illustration shows a light ray striking an object.
In the illustration, the light ray striking the object is-
absorbed
refracted
reflected
The image appears on the surface of the water. Why?
What causes day and night on Earth
Earth rotates on its axis
Earth revolves around the Sun
The Sun moves around Earth
How long does it take Earth to complete one full rotation?
About 1 month
About 1 year
About 24 hour
Why is it night in one part of the world?
That side of Earth is tilted toward the Sun
That side of Earth is facing away from the Sun
The Sun has stopped shining
Why does the Sun appear to move across the sky during the day?
The Sun is spinning
The Sun is orbiting Earth
Earth is rotating
The sun rises in the:
East
West
If the Sun is rising in the east, which direction will it set?
North
South
West
Why do shadows change size and direction during the day?
Earth’s rotation changes the Sun’s position in the sky
Clouds block the Sun
Earth gets closer and farther from the Sun
In the afternoon, shadows usually appear—
Longer, pointing east
Shorter, pointing east
Longer, pointing west
Shadows are longest during _______.
morning and evening
noon
night
Shadows are shortest around______.
morning and evening
noon
night
The sun appears to __________.
rise in the east, set in the west
rise in the west, set in the east
Where will the tree's shadow be?
A
B
C
When was this picture most likely taken?
(Hint: think about the shadow's length)
morning or evening
night
noon
Where will the tree's shadow be?
A
B
C
Which position of the sun will make the longest shadow?
A
B
C
Students are sorting materials based on their physical properties.
Which set of column headings would BEST help them classify whether items dissolve in water, conduct electricity, and are magnetic?
Soluble in Water – Conductors – Magnetic
Insoluble in Water – Insulators – Not Magneti
Soluble in Water – Insulators – Magnetic
Magnetic
SINC
ABC
Non- magnetic
SINC
ABC
Magnetic
Cobalt
Copper
Which material is a conductor of electricity?
Plastic
Copper metal
Rubber
Which object is an example of an insulator?
Aluminum foil
Iron nail
Wooden popsicle stick
A student has a mixture of sugar and black pepper.
Which two procedures would best separate the mixture?
Dissolve the mixture in water, then filter it
Use a magnet, then strain it
Strain the mixture, then evaporate the water
Why does dissolving sugar in water help separate it from black pepper?
Pepper dissolves and sugar does not
Sugar dissolves in water, but pepper does not
Both dissolve, so the filter catches everything
